checkpatch: Drop pr_warning check

All pr_warning are removed from kernel, let's cleanup pr_warning
check in checkpatch.

Link: http://lkml.kernel.org/r/[email protected]
To: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Andy Whitcroft <[email protected]>
Signed-off-by: Kefeng Wang <[email protected]>
Acked-by: Joe Perches <[email protected]>
Signed-off-by: Petr Mladek <[email protected]>

Author: Kefeng Wang

scripts/checkpatch.pl

@@ -4121,15 +4121,6 @@ sub process {
 			     "Prefer [subsystem eg: netdev]_$level2([subsystem]dev, ... then dev_$level2(dev, ... then pr_$level(...  to printk(KERN_$orig ...\n" . $herecurr);
 		}
 
-		if ($line =~ /\bpr_warning\s*\(/) {
-			if (WARN("PREFER_PR_LEVEL",
-				 "Prefer pr_warn(... to pr_warning(...\n" . $herecurr) &&
-			    $fix) {
-				$fixed[$fixlinenr] =~
-				    s/\bpr_warning\b/pr_warn/;
-			}
-		}
-
 		if ($line =~ /\bdev_printk\s*\(\s*KERN_([A-Z]+)/) {
 			my $orig = $1;
 			my $level = lc($orig);